将数据导出为ex​​cel时出现问题？

Question

我在这里我出口到数据表excel..But我得到像access to the path is denied错误我已经给予了充分的权限是folder..I不明白什么问题..

public void CreateCSVFile(System.Data.DataTable dt, string strFilePath) 
{ 
StreamWriter sw = new StreamWriter(strFilePath, false); 
int iColCount = dt.Columns.Count; 
for (int i = 0; i < iColCount; i++) 
{ 
sw.Write(dt.Columns[i]); 
if (i < iColCount - 1) 
{ 
sw.Write(","); 
} 
} 
sw.Write(sw.NewLine); 
foreach (DataRow dr in dt.Rows) 
{ 
for (int i = 0; i < iColCount; i++) 
{ 
if (!Convert.IsDBNull(dr[i])) 
{ 
sw.Write(dr[i].ToString()); 
} 
if (i < iColCount - 1) 
{ 
sw.Write(","); 
} 
} 
sw.Write(sw.NewLine); 
} 
sw.Close(); 
} 

什么建议吗？

编辑：

private void button1_Click(object sender, EventArgs e) 
     { 
       DirectoryInfo Folder = new DirectoryInfo(textBox3.Text); 
        var strFilePath = Path.Combine(textBox3.Text.Trim(), "Excel"); 
        if (Folder.Exists) 

         if (!Directory.Exists(strFilePath)) 
          Directory.CreateDirectory(strFilePath); 

       string strConn = "user id=**;password=***;initial catalog=***;data source=***;"; 


      SqlConnection conn = new SqlConnection(strConn); 

      conn.Open(); 

      System.Data.DataTable dt = new System.Data.DataTable(); 
      SqlDataAdapter da = new SqlDataAdapter("select * from " + textBox1.Text + " where pomas_pono ='" + textBox2.Text+"'", conn); 
      da.Fill(dt); 
      CreateCSVFile(dt, strFilePath); 
conn.Close(); 
} 

Answer 1

试试下面的代码：

private void BindEntryCancellationAudit() 
{ 
     try 
     { 
      invoice = new BLL_Invoice(); 
      DataTable dtAuditData = invoice.getAuditDetailsForInvoice(); 

      progressBar1.Visible = true; 
      progressBar1.Minimum = 1; 
      progressBar1.Maximum = dtAuditData.Rows.Count; 
      progressBar1.Show(); 
      Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application(); 
      app.Visible = false; 
      Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing); 
      Microsoft.Office.Interop.Excel._Worksheet worksheet = null; 
      worksheet = (Microsoft.Office.Interop.Excel._Worksheet)workbook.Sheets["Sheet1"]; 
      worksheet = (Microsoft.Office.Interop.Excel._Worksheet)workbook.ActiveSheet; 
      worksheet.Name = "Invoice Audit Details"; 

      for (int i = 1; i < dtAuditData.Columns.Count + 1; i++) 
      { 
       worksheet.Cells[1, i] = dtAuditData.Columns[i-1].ColumnName; 
      } 

      for (int i = 0; i < dtAuditData.Rows.Count - 1; i++) 
      { 
       for (int j = 0; j < dtAuditData.Columns.Count; j++) 
       { 
        worksheet.Cells[i + 2, j + 1] = dtAuditData.Rows[i][j].ToString(); 
        worksheet.Cells.EntireColumn.AutoFit(); 
        if (j + 1 < 17 && j + 1 > 12) 
        { 
         Excel.Range cell = (Excel.Range)worksheet.Cells[i + 2, j + 1]; 
         cell.NumberFormat = "0.0000"; 

        } 
       } 
       progressBar1.PerformStep(); 
      } 
      string filepath = ConfigurationManager.AppSettings["ReportLocation"].ToString(); 
      workbook.SaveAs(filepath+"\\AuditReport.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); 
      app.Quit(); 
      progressBar1.Hide(); 
      progressBar1.Visible = false; 
      System.Diagnostics.Process.Start(filepath+"\\AuditReport.xls"); 
      progressBar1.Maximum = 0; 
      progressBar1.Minimum = 0; 
     } 
     catch (Exception ex) 
     { throw ex; } 
    }